package com.ysd.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.ysd.entity.Admin;

public class LoginFilter implements Filter {

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)req;
		HttpServletResponse response=(HttpServletResponse)res;
		
		HttpSession session= request.getSession();
		Admin admin=(Admin)session.getAttribute("admin");
		String url=request.getRequestURI();
		if(url.endsWith("login.html") || url.endsWith(".css") || url.endsWith(".js") || url.endsWith(".jpg"))  {
			chain.doFilter(request, response);
		}else if(admin!=null) {
			chain.doFilter(request, response);//放行
		}else {
			response.sendRedirect("login.html");
		}
	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}
